So, what materials should you have your custom business sign made from? There are a lot of different options to consider. Metals such as brass, stainless steel, copper, and bronze are all options. Finishings and coatings can be applied to metal signs to prevent rusting and preserve their appearance. Outdoor business signs are most commonly made from aluminum and acrylic. These materials are durable and typically hold up well to outdoor conditions. Aluminum is resistant to rust and relatively lightweight, making it a good option for many business owners looking for a custom outdoor business sign. Acrylic fits virtually any design, holds color well, and looks attractive when lit.